海西 Traditional form: 海西 Pinyin (reading): Hǎixī Definitions: Haixi Mongol and Tibetan autonomous prefecture (Tibetan: Mtsho-nub Sog-rigs dang Bod-rigs rang-skyong-khul) in Qinghai Characters: 海 - sea, ocean; maritime 西 - west, western, westward Traditional characters: 海 - sea, ocean; maritime 西 - west, western, westward